William duncan



l(No Model.) 2 Sheets-Sheet 1.

W. DUNCAN'& A.R. FORDYGE. DIE PoR MAKING METALLIC LATHING..

No. 594,172. Patented Nov. 23, 1897.

gf l Z2 zgn/autom A(No Model.) I v 2 Sheets-Sheet 2.

W. DUNCAN & A.-R`.-I0RDYC "J:'I.44 DIE FOR MAKING METALLIC LATHING'.

No. 594,172. Patented Nov. 23,.1897.

NTTEDA STATES PATENT Prion.

WILLIAM DUN CAN, OF KARNEY, AND ALEXANDER R. FORDYCE, OF NEW- ARK, NEW JERSEY; SAID DUNCAN ASSIGNOR TO SAID FORDYCE.

DIE FOR MAKING METALLIC LATHING.

SPECIFICATION forming part of Letters Patent No. 594,172, dated November 23, 1897.

Application iiled August 21, 1896. Serial No. 603,453. (No model.)

To @ZZ whom zit may concern:

Be it known that we, VILLIAM DUNCAN, residing at Karney, in the county of Hudson ,and ALEXANDER RFoRDYomresding at Newark, inthe county of Essex, State of New Jersey, both citizens of the United States, have invented certain new and useful Improvements in Dies for Making Metallic Lathing, of which the followingis a full, clear, and exact description, such as will enable those skilled in the art to which it appertains to make and use the x same, reference being had to the accompanying drawings, which form a part of this specication.

This invention relates to improvements in dies or forming mechanism of that class which are used in the manufacture of metallic lathing; and it more particularly relates to improvements in such a mechanism as can be used in the manufacture of the vlathing disclosed in Patent No. 557,658, granted April 7, 189 6. The lathing disclosed in the said patent consists, primarily, of a metallic plate provided with rows of angular slits which break joint and are expanded to throw keys from opposite sides of the plate. Nhile the invention will be described in such an embodiment las to make this style of lathing, it can also be used in the manufacture of lathing of differ- -ent patterns.

The invention in the present instance has for its object the provision of dies or forming mechanism which when brought together on a sheet of metal will cut a double row of angular slits therein, the slits of one row breaking joint with the slits of the other row, and which will expand or force apart the ribs thus formed and thereby form keys projecting from opposite sides of the plate.

The invention Vconsists in the novel construction, combination, and arrangement of parts, such as will be hereinafter fully described, pointed out in the appended claims, and'illustrated in the accompanying drawings.

In the accompanying drawings, in which similar letters of reference designatelcorresponding parts, Figure l is a perspective view of the upper member of the dies or forming mechanism, partly in section and partly broken away. Fig. la is aplan sectional view of the upper member. Fig. 2 is a perspective view of the lower member of the dies or forming mechanism, partly in section and partly broken away. Fig. 2a is a plan sectional view 5 5 of a portion of the lower member. Fig. 3 is a detail view showing one of the flat-face cutters. Fig. 4 is a similar view showing one of the pointedface cutters. Fig. 5 is also a similar view showing a cutter with a corru- 6o gated face. Fig. 6 is a detail `perspective view showing one of the retaining-plates. Fig. 7 is a transverse vertical section showing both members in their proper relative positions. same, the ends being broken away, however. Fig. 8 is a plan View showing a section of the lathing. Fig. 82L is a sectional view of the lathing, taken on the line z .z of Fig. 8.

Referring to the drawings by letter, A and 7o F'respectively designate the lower and upper members of the forming mechanism or dies. They are of a length sufficient to opcrate on a sheet of metal of the desired width.

The lower member is provided with any suitable mechanism for securing it to the stationary part of a machine, andthe upper member is provided with means for attaching the same to a reciprocating mechanism adapted to operate said upper member in conjunc- 8o tion with said lower member.

There are several styles of sheet-metalworking machines in common use with which the dies can be used, the only essential requirement of such a machine being a table not be necessary to more fully describe the same. v

The lower die or member of the forming mechanism is mounted in a holder A', consisting of a casting having a base ct, from the ends of which the lugs d a project. Through roo the recesses a2 a2, formed by these lugs at either end of the casting, bolts may be passed Fig. 7a is a front elevation of the 65 A feed mechan- 9o spectivcly.

for securing the holder in place. Projecting from the upper face of the casting and longitudinally of the same are the parallel iianges or offsets a3 a3, between which the die proper is fastened. The lower die consists of two sets of cutters B and C, respectively. The set B consists of a series of plates l) l), arranged in a line. Each of these plates is made of hardened steel and is angularly bent along its medial line b, and is thereby given the concave and convex faces b2 and b3, re The upper edge of the concave face forms the cutting edge b4. The upper face b5 is depressed from the cutting edge toward the convex face ha to better adapt the cutting edge D" to its purpose. The set C consists of a series of plates c c, also arrangedin a line. The latter are like those of the set B, except that their cutting edges c c are angular instead of straight and that the cutting edge is formed on the convex side of the plate. The two sets of cutters, consisting of the plates b l) and c c, respectively, are arranged in parallel lines between the offsets a3 a3 of the holder. The plates of each set are placed so as to have spaces s s between their adjacent sides, and they are held in their proper relative positions by a plate D. The latter is provided with a series of concave depressions cZ d for the reception of the convex faces b3 b3. Between two adjacent depres sions a rib CZ' projects. It serves to separate the plates and to hold them in their proper relative positions. The two sets of plates are placed so that the concave sides of one set will be against the concave sides of the other set, and also so that the plates of one set will break joint with the plates of the other set. By breaking joint it is meant that the plate in one set overlaps two plates in the other set. The plate D, backing the set C, is cut away to a considerable extent, so as to leave the plates bare at their upper ends, so that they can perform their functions. The cutters and their retaining-plates are seated between the offsets a3 a3 of the holder. They are secured therein by the set-screws d2 cl2, passing through one of the offsets a3 and impinging against one of the blocks d3 d3, between which the cutters and retaining-plates are seated.

The upper member F of the dies or forming mechanism has substantially the same construction as the lower member. It con sists of two sets f and f of cutters, held in their proper relative positions by the plates D4 and D5. Both sets of cutters in the upper member have angular cutting edges. In the set f the cutting edges f2 are on the convex sides of the plates, and in the set f the cutting edges f3 are on the concave sides of their respective plates. The relative arrangement of the plates in both members is such that when they are brought together the several cutting edges will register. A somewhat differently-constructed holder is used for the upper member, however. It consists of the angle-iron H, in the angle of which the cutters and their retaining-plates are mounted. They are secured therein by the clampingplate D5 and the bolts h3 h3, passing through the same and the angle-iron. The latter is secured to the bracket h', and the latter has a shank 71,2, by means of which the holder can be secured in the reciprocating mechanism.

The operation of the device is as follows: The two members of the forming mechanism or dies having been mounted in a suitable machine and adjusted so that their cutters will register properly, asheet of metal is placed between the two dies and the machine set in motion. In actual practice the metal is fed by an intermittent feed, the latter automatically operating to supply between the strokes of the reciprocating die just so much metal as is required foreach stroke. This feed mechanism should also be of such a character as to firmly hold the plate while the latter is being oper ated upon by the dies. lVhen the two members of the forming mechanism are brought together, the cutting edges b of the set of plates B will register with the cutting edges f2 of the plates f and the cutting edges c' of the set C will register with the cutting edges f3 of the set f. It is also to be observed that the registration is such that when the set B registers with the set f the spaces s between the cutters of one set will register with the spaces s of the other set. The same can also be said when the two sets C and f come together. Furthermore, the spaces of one set are not in line with the spaces of the other set in the same holder, owing to the breaking joint of their respective cutters. The dies on coming together stamp out a complete section of the lathing at one stroke. After the dies separate sufficient metal is fed forward for a second impression. Owing to the double arrangement of the cutters and their breaking joint, when the dies come together for the succeeding stroke the cutters c, forming the set C of the lower die and the cutters of the set f of the upper die, will cut slits in the plate, which will break joint with the slits formed in the preceding stroke of the dies by the cutters b in the lower die and the cutters f of the upper die. By this arrangement it is seen that it is necessary to feed the plate forward only. In some of the machines now in use the dies are formed of a single line of cutters. This construction requires a double feed of the plate. For a succeeding stroke the plate must not only be fed forward, but it must be fed sidewise, in order that the slits formed by the succeeding stroke will break joint with the slits formed by the pre ceding stroke. In the device in the present instance this double feed is not required, as the slits made by the coming together of the cutters b in the lower die and the cutters f of the upper die will always break joint with the slits formed by the cutters c of the lower die registering with the cutters f of the upper die. The metal after it has been operated upon IOO IIO

IIS

has an appearance like that shown in Fig. 8. The cuts as are made by the cutting edges b4 and f2, and the cuts cc are formed by the cutting edges c' and f3. The ribs @c2 have the same width as the thickness of the plates forming the cutters. Owing to the spaces s between the cutters, portions x3 of the metal remain uncut and serve to connect the ribs 002 and also serve to form the keys of the lathin g. The ribs are substantially angular in outline, owing to the angular bend in the cutters. Vhen the ribs are forced apart to form the mesh and to expand the plate, there must lbe some give to allow the elongation of the ribs. Instead of the metal stretching or the plate contracting in width as a whole the angularity in the ribs is straightened out to a considerable extent and thereby compensates for the extra length given to the ribs by their forced depression. If the ribs should be straight, the metal in each individual rib would have to stretch or the sheet of metal as a whole would be considerably diminished. It is obvious,therefore, that the finished metal lathin g will have substantially the same width as the original sheet and at the same time will be lengthened to a considerable extent.

In Fig. 5 is shown a modification of the cutters. The upper face L of this cutter is corrugated, and consequently the cutting edge Z is also corrugated. This cutter is designed to be used when it is desired to produce a lathing having numerous corrugations.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

l. In a die for making metallic lathing, a holder, and the cutters mounted therein, the latter being arranged in rows so that the cutters of one row break joint with those of an adjacent row, and so that a cutterin one row has a face contacting with the faces of the two opposite cutters in an adjacent row.

2. In a die for making metallic lathing, a holder, and the cutters mounted therein, the latter being angular in cross-section and arranged in rows so that the cutters of one row break joint with those of an adjacent row.

3. In a die for making metallic lathing, a holder, and the cutters mounted therein, the latter being angular in cross-section and arranged in parallel rows so that the cutters of one row break joint with those of an adjacent row, and so that each cutter in one row has its concave face contacting with the concave faces of the two opposite cutters in an adjacent row.

4C. Ina die for making metallic lathing, a holder, and the cutters mounted therein, the latter being angular in cross-section and arranged in rows so that the cutters of one row break joint with those of an adjacent row, and so that there are spaces between the cutters of each row.

5. In a die for making metallic lathing, a holder, and the cutters mounted therein, the latter being arranged in rows so that the cutters of one row break joint with those of an adjacent row, and so that a cutter in one row has a face contacting with the faces of the two opposite cutters in an adjacent row, and also so that there are spaces between the cutters of each row.

6. In a die for making metallic lathing, a holder, and the cutters mounted therein, each of the latter being bent along a medial line so as to be angular in cross-section, the said cutters being arranged in rows so that those of one row break joint with those of an adjacent row and so that there are spaces between the cutters of each row, with each of which spaces the bent portion of a cutter in an adjacent row registers.

7. In a die for making metallic lathing, a holder, andthe cutters mounted therein, the latter being arranged in two parallel rows, one of said rows being formed of cutters having cutting edges in substantially the same plane, and the other row formed of cutters having angular cutting edges.

8. In a die for making metallic lathing, a holder, cutters angular in cross section mounted therein and arranged in a row, and a retaining-plate having concave recesses formedtherein to receive the convex backs of said cutters.

9'. In a die for making metallic lathing, a holder, cutters, angular in cross section, mountedin said holder and arranged in a row with spaces between them, and a retainingplate having concave recesses formed therein to receive the convex backs of said cutters and having ribs projecting into the spaces between said cutters.

In testimony whereof we affix our signatures in the presence of two witnesses.

WILLIAM DUNCAN. ALEXANDER R. FORDYCE. Witnesses to the signature of Duncan:

EMMA I. CARTER, NATHANIEL R. PORTER. Witnesses to the signature of Fordyce :v

JONATHAN POTTER, WM. H. POTTER.

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